//
//  OAuthViewController.swift
//  我的微博
//
//  Created by 刘静 on 15/10/20.
//  Copyright © 2015年 liujing.cn. All rights reserved.
//

import UIKit
import SVProgressHUD
class OAuthViewController: UIViewController,UIWebViewDelegate {
    
    
///  MAEK: 搭建界面
    private lazy var webView = UIWebView()
    
    override func loadView() {
        view = webView
        webView.delegate = self
        
        title = "新浪微博"
        navigationItem.rightBarButtonItem = UIBarButtonItem(title: "关闭", style: UIBarButtonItemStyle.Plain, target: self, action: "close")
    }
    
///  关闭界面
    func close(){
        
        SVProgressHUD.dismiss()
        dismissViewControllerAnimated(true, completion: nil)
        
    }
    
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        //加载授权页面
        webView.loadRequest(NSURLRequest(URL: NetworkTools.sharedTools.oauthUrl()))
        
        
    }
    
///  MARK: UIWebViewDelegate
    
    func webViewDidStartLoad(webView: UIWebView) {
        SVProgressHUD.show()
    
    
    }
    
    func webViewDidFinishLoad(webView: UIWebView) {
      SVProgressHUD.dismiss()
    }
    /*
    
    1.如果请求的url 包含 回调地址  ，需要判断参数，否则继续加载
    
    */
    func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        
        let urlString = request.URL!.absoluteString
        //判断是否包含回调地址
        if !urlString.hasPrefix(NetworkTools.sharedTools.redirectUri){
            
            return true
            
        }
        
        print("判断参数")
        print(request.URL?.query)
        
        if let query = request.URL?.query where query.hasPrefix("code="){
        
        print("获取授权码")
            //从query 中截取授权码
            let code = query.substringFromIndex("code=".characters.endIndex)
            
            print(code)
            //TODO:换取 TOKEN
            loadAccessToken(code)
            
        }else{
        
         close()
        }
        
        return false
    }
    
    private func loadAccessToken(code:String){
    
        NetworkTools.sharedTools.loadAccessToken(code) { (result, error) -> () in
            if error == nil || result == nil {
           self.netError()
                return
                
                }
           //字典转模型
            //1. 用 token 获取的信息 创建用户账户模型
            //2. 异步加载用户信息
            //3.  保存用户信息(模型中完成)
            
          UserAccount(dict: result!).loadUserInfo({ (error) -> () in
            if error != nil {
             self.netError()
            return
            
            }
            
            print("OK")
            
          })
            
            
            
        }
    }
   
///  出错处理
    private func netError(){
    
        SVProgressHUD.showInfoWithStatus("您的网络不给力")
        
        //延长一段时间再关闭
        let when = dispatch_time(DISPATCH_TIME_NOW, Int64(1 * NSEC_PER_SEC))
        dispatch_after(when, dispatch_get_main_queue()){
            
            self.close()
            
        }

    
    
    }


}


